Pneumatic pyrometer.



No. 639,3l7. Patented nee. I9, |899. F..` A. uEHLlNG & A. STEINBART.PNEUMATIC PYRUMETER.

(Application led Aug, 4, 1897,)

(No Model.) 2 Shets-Sheet l.

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Patented Dec. 19, |899.

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E. A. UEHLING & A. STEINBART.

PNEUMATIG PYROMETER.

(Application led Aug. 4, 1897.)

(No Model.)

WMM/wom- Nz Ncnms sirens co.. Mofoumo., WASHINGTON. n. c.

NiTE STATES PATENT OFFICE.

EDWARD A. UEHLING, on NEWARK, AND ALERED STEINDART, on CARL- STADT, NEWJERSEY.

PN EU MATIC PYROMETER.

SPECIFICATION forming part ofIJetters Patent N o. 639,317, datedDecember 19, 1899. Application filed August 4, 1897. Serial No. 647,025.(No model.)

To all whom, it may concern:

Beit known that we, EDWARD A. UEHLING, a citizen of the United States,and a resident 'of Newark, in the county of Essex, and AL- FREDSTEINBART, a native of Germany, (but having declared in due form myintention of becoming a citizen of the United States, and possessingofficial papers from the German Government that I am no longer a subjectof '1o the German Emperor,) residing at Carlstadt,

in t-he county of Bergen, State of New Jersey, have invented certain newand useful Improvements inv Pneumatic Pyrometers, of which the followingis a specification.

This invention relates to improvements in pneumatic pyrometers, andespecially to improvements in the pneumatic pyrometers for which UnitedStates Letters Patent No.11,413, reissued April 17, 1894, and No.554,323,issued zo February 11, 1893, were granted to us.

The object of ourV invention is to simplify the construction, to renderthe instrument more effective and reliable, so that it requires lessattention and care.

'25 In the accompanying drawings, forming a' part of this specification,and in which like letters of reference indicate like parts in all theviews, Figure 1 is a side elevation of our improved pyrometer. Fig. 2 isa front elevago tion of the same and alongitudinal View of theiire-tube. Fig. 3 is a central vertical sectional view of the upper partof the apparatus on an enlarged scale. Fig. 4L is a longitudinalsectional View of the lire-tube. Fig. 5 is a 3 5 detail sectional viewof the apertured disk.

Fig. 6 is a vertical detailed sectional view of the suction device. l

The vertical cylindrical bodyA is provided with a base A. To the frontof said body A 4o an upright supporting-arm B is bolted at the top andis provided at about two-thirds of its height with a bend or flat oisetportion B toward the rear, to which portion B a pot C is bolted which isclosed at the bottom and is closed at the top by a suitable cover C. Ahead C2 is formed on the upper end of the arm B, and from the same acentral web or ridge O3 extends down the entire length of the arm on thefront, conforming to the configuration 5o of the face of the arm. Ametal plate D, on the face of which a proper pyrometric scale isproduced, is fastened longitudinally to the front of the vertical bodyand is provided along each longitudinal edge with a ange D', the lowerends of said flanges and said plate extending to a bracket D2`on thefront of the body, into which bracket a glassr jar D3 is screwed fromthe bottom. Thejar has a cover D4, from which a gage-rod D5 extends downinto the jar.

The pyrometric or temperature scale may be produced on the plate D inany suitable manner by printing, casting, or engraving, or it may beprinted on a strip ofpaper pasted on said bar.

The base A' of the body A has a neck a provided with a stop-cock a', andthe outer end of said neck is connected with a cross a2, from which atube b extends up tothe bottom of thepot C and is in communication withthe 7o interior of said pot.

Two glass tubes E and F are placed against the inner sides oi' thelianges D of the plate D and in such a manner that the tube F isdirectly in front of the scale, and said glass tubes pass `throughopenings in the cover D4 into the jar D3 to near the bottom of the same.The upper ends of the glass tubes E and F are held by suitablepacking-couplings c in the head C2 on the arm B. The upper end of 8o theglass tube E is connected by said coupling c and the metal tube E withthe upper part of the hollow bodyA or regulator,7 as it will now bedesignated. The upper end of the glass tube F is connected by itscoupling c and the tube F with a chamber H, projecting laterally fromthe upper part of the pot O and having its outer end closed. Arecording-gage G of any suitable construction is brought incommunication with said oham- 9o ber either directly, as shown, or itmay be located a greater or less distance away and connected with saidchamber by a tube. The chamber H is also connected by a tube H with theplatinum tube which is kto be inserted into the furnace, heater, duc.,of which the temperature is to be determined and which platinum tubewill be described in detail hereinafter. A filter W is formed in saidchamber. It serves to protect the fine parts roo of the instrument incase the air-conductingtube system breaks.

A neck J, projecting laterally from the upper part of the pot O,contains a suction device, such as a steam-operated aspirator orinjector of any desired construction, such as are usuallyfprovided forproducing suction for the purpose of delivering water into boilers, tbc.but in this case this well-known snction device is only to be used forproducing a partial vacuum, and said neck is provided with a coupling Jfor connecting a steampipe with the said neck J. A tube K, having a cockK', connects the neck J with the upper part of the regulator A.

L is a filling-neck for the regulator.

A coiled pipe M in the pot C connects the chamber H with the neck I andpipe I', leading from the pot C to top of regulator A.

A tube N, open at the top and bottom, is secured in the top of theregulator and extends down to near the bottom of the same, thus forminga substantially U -shaped vessel having two legs of greatly-differentdiameter' and in communication with each other at their lower ends.

In the neck I a copper or other metal disk m is clamped, and in the samea finely-apertured platinum disk O is held, aperture being one of theapertures in a system of pipes or chambers to be referred tohereinafter. The other fine aperture @c is formed in the closed end of aplatinum tube I), surrounded by a larger platinum tube R, also closed atthe outer end. The inner ends of the platinum tubes P and R are attachedto the copper tubes P and R', respectively. The other end of the tube P'is secured in one end piece of a cu P2 havin(r a neck P3 to which isconnected the tube l-I, leading to the chamber H on the pot C. The cupP2 is filled with loose cotton-batting up to a screen P4, and thus is afilter for the air passing through the pipe system. One end of the cupP2 is enlarged to form one end of an additional but larger cup Q, in theopposite end of which the inner open end of the tube R is held. In

said cup'Q two Wire screens Q2 are secured near the ends and the spacebetween the cups is filled with cotton-batting to form a filter. R2 isan air-inlet aperture for the cup Q. A Waterjacket S of suitableconstruction is formed on the head Q and surrounds part of the tube R'and is provided with the inlet and outlet necks S S2 for thecooling-Water.

The platinum tubes just described are inserted into a furnace, hot airor gas main, or into any other heated space the temperature of which isto be determined. The outer air entering through the inlet-opening R2passes through the filtering-screens Q2 and thecotton-batting in the cupQ and through the tubes R R to the minute aperture in the end of theinner platinum tube P, into said tube P, to the cup P2 through thecotton-batting in the same, and to the neck P3 and tube II' to thechamber I-I. From the same, as well as through the above-mentionedtubes, it is drawn by suction in the regulatorA through the coil M, inthe pot C, and through the ap; erture x and the tube I into the'regulator. From the latter it is drawn by the aspirator through the pipeK and conveyed into the pot C, from which it passes off with the wastesteam, drip water, tbc., through the pipe b.

The operation is as follows: Live steam is admitted to the aspirator orlike suction device in the neck J, and the exhaust or waste steam thathas operated the aspirator escapes into the pot C. As the neck J, inwhich the aspirator is located, is in connection with the upper part ofthe regulator A bythe pipe K, the suction produced by the aspiratorforms a partial vacuum in the regulator, and this vacuum is maintainedby means of the aspirator at a certain predetermined height ofwater-column shown in the glass-tube E. In consequence of this suctionthe atmosphere enters the filter Q and passes through the pipe systemdescribed to the aperture andv before entering the same it attains thetemperature to be determined and enters the pipe system through theaperture :n at this temperature, and iinally before leaving the pipesystem through the aperture ec'` this air is brought or cooled to 212owhile passing through the coil M, Which is surrounded by theexhaust-steam in the pot, and is thus maintained at a temperatureV of212o as the aspirator discharges its exhaust-steam into the pot, asstated above. The temperature remaining `constant at the outlet-aperturezt', the change in tension of the air in the pipe system between theapertures as x depends' upon the changes in temperature at the inlet=aperture and as the changes of tempera-A ture affect the tension of airin the regulator A the column of water in the glass gage-tube F rises orfalls correspondingly, and if a re cording-gage is used aifects the samecorre; spondingly.

Having now described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

l. In a pneumatic pyrometer, the combination with an upright vessel forcontaining Water, of an upwardly-extending arm on the same,'a pot heldby said arm and a pipe system having apertures at its ends, which pipesystem is connected with the upper part of said upright vessel and partof which system passes through said pot and a glass gagetube-containinga water-column and in communication with said pipe system, substantiallyas herein shown and described.

2. In a pneumatic pyrometer the combination with a vessel for containingwater and divided longitudinally into two chambers of which one isclosed and the other communicates with the air, of a pot, a suctiondevice connected with the upper end of the closed chamber of said vesseland with the pot, a pipe system having apertures at its ends andconnected beyond the part between the apertures, with the upperv part ofthe closed chamber of said vessel and a glass gage-tube con- IOO IZO

nected with said pipe system between the apertures and a jar into whichsaid gage-tube dips, substantially as herein shown and described.

3. In a pneumatic pyrometer the combination with an upright vessel,divided longitudinally into two chambers ot' which one is closed at thetop and the other open to the air, of a pot, a suction device incommunication with said pot and with the closed chamber of said vessel,a coil in said pot, an aper- ,ured disk at the outlet end of said coil,a pipe connecting said outlet end with the closed chamber, a pipe systemconnected with the inlet end ofthe coil and having an inlet-aperture atits opposite end, a glass gage-tube connected with said pipe systembetween the apertured ends and ajarinto which the lower end of saidgage-tube dips substantially as herein shown and described.

4L. In a pneumatic pyrometer, the combination with a pipe system havingan inlet and an outlet aperture, a suction-chamber connected with thesaid pipe system; a suction device connected with said chamber and awatergage tube connected with said pipe system between the aperturedends and a water-jar into which said gage-tube dips substantially asherein shown and described.

5. In a pneumatic pyrometer, the combination with an upright vessel, ofan upwardlyprojecting arm on the same, a pot secured to said arm, aplate secured to said upright vessel and having longitudinal iianges,glass tubes placed on the front of said arm and flanged plate, apipesystem having apertured ends, with which vpipe system one of said glasstubes is connected the other being connected with the top of the uprightvessel, and a suction device for producing suction in said uprightvessel and in the pipe system and a water-jar into which the lower endsof said pipes are dipped substantially as herein set forth.

6. In a pneumatic pyrometer the combination with a pipe system havin gend apertures, of a water-gage glass tube connected with said pipebetween the said end apertures, a pot for heating part of said pipesystem at one of the apertures uniformly and a steam suction device forproducinga circulation of air in said pipe system,which steam suctiondevice discharges into the pot for heating part of said pipe systemsubstantially as herein shown and described.

7. In a pneumatic pyrometer the combination with a pipe system havingapertures, of a device for conveying air through said pipe system bysteam; and means for heating part of said pipe system at one of theapertures by the exhaust-steam of said steam-operated air-conveyingdevice and an indicator connected with said pipe system7 substantiallyas herein shown and described.

8. In a pneumatic pyrometer the combina-l tion with a pipe system havingapertures of a steam -operated device for conveying air' through saidpipe system, a potthrough which part vof said pipe system passes andinto which said steam-operated device discharges its exhaust and anindicator connected with said pipe system, substantially as herein shownand described.

In testimony that we claim the foregoing as our invention we have signedour names in presence of two witnesses.

EDWARD A. UEI-ILING. ALFRED STEINBART, Vitnesses for E. A. Uehling:

JOHN FISCHER, OTTO E. TRAUDT. Witnesses for A. Steinbart:

OSCAR F. GUNZ, N. M. FLANNERY.

